Here are some links to the two battery setup. We are using a battery isolator for now but will move to two alternators later.
http://www.themonstersound.com/h2/DSC00459.jpg
http://www.themonstersound.com/h2/DSC00460.jpg
We are also adding an 8" screen where the headunit usually goes and relocating onstar to the center console. Check out the rest of the pics and let me know what you think.
http://www.themonstersound.com/h2/index0002.html